Article
Chemistry, Inorganic & Nuclear
Chuting Zhang, Lijuan Peng, Bohou Song, Zhiwen Li, Xiaoqun Cao
Summary: A sustainable catalyst system for Sonogashira cross-coupling reaction was developed using nanoporous palladium as the catalyst. The catalyst remained stable and active over multiple cycles without significant leaching or loss of activity, and high yields of the desired alkynes were obtained.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Shuo He, Yujie Chen, Zhi-Bin Huang, Bao Li, Da-Qing Shi, Yingsheng Zhao
Summary: A palladium-catalyzed cross-coupling reaction between the ortho-C(sp(2)) atom of aromatic amines and aliphatic aziridines has been developed, enabling the construction of the O-aminophenethylamine skeleton via C-H activation. The reaction shows good substrate scope and can generate the O-aminophenethylamine skeleton in drugs or bioactive compounds in a one-step process.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Organic
Zhenbang Chen, Zengming Shen
Summary: An efficient method for Ni-catalyzed asymmetric reductive arylcyanation of alkenes is developed, producing chiral 3-cyanomethyl oxindoles with all-carbon quaternary stereocenters in high yields and enantioselectivities. The use of acetonitrile as a cyano source through beta-carbon elimination assisted by Zn(OTf)(2) avoids the release of free cyanide anions, preventing competitive coordination with the metal center and maintaining enantioselectivity. This method also finds valuable applications in the synthesis of natural alkaloids (-)-physostigmine and (-)-esermethole.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Organic
Xi-Chao Wang, Hao-Ran Wang, Xiufang Xu, Dongbing Zhao
Summary: The paper discusses the significance of investigating sila-8-membered ring fused biaryls for the discovery of new drug lead compounds. It presents a method for synthesizing these compounds through chemo- and regio-selective cross-dimerization of 5-membered palladacycles with silacyclobutanes under Pd-catalytic conditions. This method provides an efficient route for ring expansion to create the desired sila-8-membered ring fused biaryl skeletons.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jinghao Wang, Lulu Zuo, Zhiyu Guo, Caoyu Yang, Yuheng Jiang, Xuewei Huang, Lizhu Wu, Zhiyong Tang
Summary: Photoelectrochemistry is an innovative approach to organic synthesis, showing great potential for efficient and selective activation of amine compounds. The developed photoelectrode materials exhibit high efficiency, remarkable repeatability, and good tolerance towards functional groups.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Chaolumen Bai, Huifang Guo, Xin Liu, Dan Liu, Zhaorigetu Sun, Agula Bao, Menghe Baiyin, Tegshi Muschin, Yong-Sheng Bao
Summary: A novel methodology was developed for the synthesis of pyridine skeleton through cascade reaction of acetonitrile, arylboronic acids, and aldehydes. Both palladium acetate and supported palladium nanoparticles showed similar catalytic performance in this reaction, suggesting a possible Pd(0)/Pd(II) catalytic cycle. The products exhibited good fluorescence characteristics, indicating a promising approach for constructing pyridine skeleton.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Kun-Long Song, Bin Wu, Wan-Er Gan, Wan-Chun Yang, Xiao-Bing Chen, Jian Cao, Li-Wen Xu
Summary: The palladium-catalyzed carbonylative C-C bond activation reaction described in this study involves C-C bond cleavage, ring-opening, and amino- or alkoxycarbonylation reactions on cyclobutanones. Two C-C bonds and one C-O or C-N bond are formed under gas-free conditions using CO surrogates, yielding a variety of indanones with ester or amide groups.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Yang Liu, Wusheng Guo
Summary: This study reports the development of metal-free chemical processes using recyclable heterogeneous catalysts at ambient conditions, which is highly desired in pharmaceutical production. By using insoluble carbon nitride as a photocatalyst, pharmaceutically relevant organophosphorus(V) compounds were efficiently synthesized through the coupling of readily available starting materials. The photocatalyst exhibited wide functional group tolerance and the reactions were performed under visible-light irradiation at room temperatures. The recyclable g-CN photocatalyst could be easily separated and reused for multiple cycles without decreasing the reaction efficiency, indicating its great potential for larger-scale synthesis in industrial manufacturing.
Article
Chemistry, Multidisciplinary
Kananat Naksomboon, Enrique Gomez-Bengoa, Jaya Mehara, Jana Roithova, Edwin Otten, M. Angeles Fernandez-Ibanez
Summary: Pd-catalyzed C-H functionalization reactions of non-directed substrates have emerged as a promising alternative to the use of directing groups. A new type of S,O-ligand has been found to be highly efficient in promoting Pd-catalyzed C-H olefination reactions of non-directed arenes, although its role in the process was unclear. Through various mechanistic tools, it was discovered that C-H activation is the rate-determining step and the S,O-ligand triggers the formation of more reactive Pd cationic species, explaining the observed acceleration of the reaction. These findings provide important insights into the role of the S,O-ligand in promoting Pd-catalyzed C-H functionalization reactions.
Article
Chemistry, Multidisciplinary
Feng-Yuan Wang, Yu-Xiu Li, Lei Jiao
Summary: The Catellani reaction, known as Pd/norbornene (NBE) catalysis, is a versatile method for the synthesis of multisubstitued arenes. However, the inherent ortho-constraint of the haloarene substrate often limits the efficiency of the mono ortho-functionalization process. This limitation has been overcome by the development of structurally modified NBEs (smNBEs) and the recently discovered Pd/olefin catalysis, which allows for ortho-alkylative Catellani reactions without NBE. These advancements demonstrate the power of rational ligand design in metal catalysis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Federica Valentini, Francesco Ferlin, Elena Tomarelli, Hamed Mahmoudi, Mojtaba Bagherzadeh, Massimo Calamante, Luigi Vaccaro
Summary: Three different Pd-0-based heterogeneous catalysts were developed and tested in the Cassar-Heck reaction, with bis-imidazolium showing the best performances. Aqueous acetonitrile azeotrope was selected as the reaction medium for its best catalytic efficiency and ease of recovery and reuse. The synergy between the catalyst and reaction medium allowed for highly satisfactory isolated yields of various substrates while minimizing waste generation.
Article
Chemistry, Physical
M. Dolores Fernandez-Martinez, Cyril Godard
Summary: A simple procedure was used to synthesize two series of ligand-capped supported Pd nanoparticles catalysts, which were tested in formate synthesis. Among these series, PPh3 showed the most appropriate stabilizing ligand, while TiO2 was the most efficient support for these catalysts. The hydrogenation of CO2 was conducted under mild reaction conditions (1.8 MPa CO2, 1.8 MPa H-2, 60 degrees C) using water as a solvent and a base, resulting in excellent selectivity towards formates with a TON of 1032 (TOF of 69 h(-1), [HCOOK]=1.1 mol/l).
Article
Chemistry, Physical
Zhanchong Li, Liangying Wu, Jiabao Guo, Yifei Shao, Yang Song, Yuzhou Ding, Li Zhu, Xiaoquan Yao
Summary: This paper synthesized Au/TiO2 nanocomposite and utilized it as a highly efficient and green photocatalyst for organic reactions. By using oxygen as a green oxidant and catalytic amount of acid as additive, a light-promoted Minisci oxidative coupling reaction was developed with good functional group tolerance and high yields for various substrates. The Au/TiO2 nanocomposite proved to be an efficient photocatalyst to activate C-H bonds via a SEO approach and demonstrated good recycling performance without significant decrease in yield.
Article
Multidisciplinary Sciences
Chengtao Yue, Qi Xing, Peng Sun, Zelun Zhao, Hui Lv, Fuwei Li
Summary: The study successfully stabilized palladium in heterogeneous C-C bond formations by developing a novel bifunctional support catalyst, providing new experimental evidence for improving the stability of catalysts and enhancing the efficient applications of supported metal catalysts in advanced synthesis.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Sung Gyu Lee, Myung Jong Kang, Myeongkee Park, Ki-jeong Kim, Hangil Lee, Hyun Sung Kim
Summary: In this study, CdS nanoparticles modified with Au2S and Ag2S were prepared as hetemstructure photocatalysts. The photocatalysts showed high selectivity in converting aromatic alcohols to benzaldehyde and deoxybenzoin. By altering the cocatalyst component through simple ion exchange, benzyl alcohol could be photoconverted with high selectivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Akihiko Anzai, Akira Yamamoto, Hisao Yoshida
Summary: The photocatalytic reduction of CO2 to valuable chemicals using water as a resource has gained attention. In this study, Ag nanoparticles loaded barium tetratitanate (Ag/BaTi4O9) successfully promoted the high-selectivity production of CO in an aqueous solution.
Article
Chemistry, Physical
Masami Fujita, Akira Yamamoto, Naoki Tsuchiya, Hisao Yoshida
Summary: This study investigates the adsorption behavior of hydrogen on platinum nanoparticles supported on alumina. The research reveals a positive linear relationship between the hydrogen coverage and the Pt-Pt bond distance, indicating that hydrogen adsorption triggers surface reconstruction of the nanoparticles.
Article
Chemistry, Physical
Surya Pratap Singh, Akira Yamamoto, Hisao Yoshida
Summary: This study investigated the direct conversion of ethane to n-butane and hydrogen using gold loaded gallium oxide and titanium dioxide photocatalysts. The Ga2O3 photocatalyst produced n-butane, ethene, and hydrogen with a nearly stoichiometric ratio of products. The addition of gold to the Ga2O3 sample significantly increased the production rate of n-butane, while the addition of gold cocatalyst improved the photocatalytic performance of the TiO2 sample.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Applied
Luis F. Garay-Rodriguez, Leticia M. Torres-Martinez, Hisao Yoshida, Isaias Juarez-Ramirez
Summary: Powder samples of Na2Ti3O7 were prepared and deposited with Co3O4 and CuO by wet impregnation, which showed improved photocatalytic activity. The concentration of CuOx had a significant influence on the product selectivity, with smaller amounts promoting H2 formation and larger amounts promoting CH4 formation. The Na2Ti3O7 phase transformed slowly under illumination, while the CuO cocatalyst was reduced, causing a change in the reaction performance.
TOPICS IN CATALYSIS
(2022)
Article
Astronomy & Astrophysics
Ming-Chang Liu, Kaitlyn A. McCain, Nozomi Matsuda, Akira Yamaguchi, Makoto Kimura, Naotaka Tomioka, Motoo Ito, Masayuki Uesugi, Naoya Imae, Naoki Shirai, Takuji Ohigashi, Richard C. Greenwood, Kentaro Uesugi, Aiko Nakato, Kasumi Yogata, Hayato Yuzawa, Yu Kodama, Kaori Hirahara, Ikuya Sakurai, Ikuo Okada, Yuzuru Karouji, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Masahiro Nishimura, Toru Yada, Masanao Abe, Tomohiro Usui, Sei-ichiro Watanabe, Yuichi Tsuda
Summary: The study of particles returned from asteroid Ryugu reveals extensive aqueous alteration on its parent body, similar to rare CI chondrite meteorites. One particle, C0009, contains anhydrous silicates at a level of around 0.5%, providing insight into the unaltered original materials of Ryugu. In situ oxygen isotope measurements of C0009 suggest the presence of olivine with oxygen isotopes similar to those in amoeboid olivine aggregates and chondrule phenocrysts, indicating their incorporation into Ryugu's protolith. The study also raises the possibility that the protoliths of CI and other carbonaceous chondrites contained similar anhydrous silicates.
Editorial Material
Chemistry, Physical
Hisao Yoshida
CATALYSIS SURVEYS FROM ASIA
(2023)
Article
Chemistry, Inorganic & Nuclear
Akira Yamamoto, Xueshi Liu, Kazuya Arashiba, Asuka Konomi, Hiromasa Tanaka, Kazunari Yoshizawa, Yoshiaki Nishibayashi, Hisao Yoshida
Summary: Selective reductive conversion of organic and inorganic compounds has been achieved using a combination of samarium(II) diiodide (SmI2) and water. In this study, we used in situ X-ray absorption spectroscopy to analyze the structure of the Sm2+-water complex in tetrahydrofuran (THF) in the presence of water. The results provide fundamental insights into the reactivity and chemoselectivity of the Sm2+-water complex system.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Wirya Sarwana, Daichi Takami, Akira Yamamoto, Hisao Yoshida
Summary: Photothermal steam reforming of methane (PTSRM) is a promising catalytic technology for converting methane and water into hydrogen using solar energy. This study investigated the photothermal catalytic activity of silica-supported nickel catalysts under concentrated light irradiation and identified factors influencing the activity and selectivity. The results showed that the activity of PTSRM was affected by both thermodynamic and kinetic aspects, and the product selectivity was different from thermal steam reforming in the dark. This study highlights the potential of controllable selectivity in PTSRM systems under concentrated sunlight irradiation.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Shimpei Naniwa, Kosaku Kato, Akira Yamamoto, Hisao Yoshida, Akira Yamakata
Summary: Heterogeneous photocatalysis is a promising technology for artificial photosynthesis and environmental remediation. Understanding trap states of photoexcited carriers is crucial for the development of efficient photocatalysts. This study found that the depth of electron traps on anatase TiO2 nanoparticles decreases with increasing particle size.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Hongxuan Qiu, Akira Yamamoto, Hisao Yoshida
Summary: Efficient and selective photocatalytic conversion of CO2 into valuable chemicals is highly desired, and the development of advanced photocatalysts is crucial. In this study, a composite photocatalyst consisting of Ga2O3 and CTO was fabricated by calcination of physical mixtures and subsequent loading of an Ag cocatalyst. The optimized sample exhibited high CO formation rate and selectivity in photocatalytic CO2 reduction, with Ga2O3 acting as an antenna and CTO serving as the active part.
Article
Chemistry, Physical
Hongxuan Qiu, Akihiko Anzai, Tayyebeh Soltani, Akira Yamamoto, Eri Fudo, Atsuhiro Tanaka, Hiroshi Kominami, Hisao Yoshida
Summary: Heterogeneous photocatalytic CO2 reduction with water has been improved by adding Ag nanoparticles as a cocatalyst and Pr as Pr6O11 species on the surface of an Ag-loaded CaTiO3 photocatalyst. The calcination temperature during sample preparation affected the state of Pr species and greatly influenced the photocatalytic performance. It was found that Pr6O11 species were loaded between the CTO surface and Ag NPs, suggesting improved electron migration from CTO photocatalyst to Ag NPs via the Pr6O11 layer.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ryoichi Kanega, Erika Ishida, Takaaki Sakai, Naoya Onishi, Akira Yamamoto, Hiroki Yasumura, Hisao Yoshida, Hajime Kawanami, Yuichiro Himeda, Yukari Sato, Akihiro Ohira
Summary: This paper reports a flow battery system using CO2 and formate for storage and generation of electricity, exhibiting good cycle stability and high discharge capacity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Daichi Takami, Junya Tsubakimoto, Wirya Sarwana, Akira Yamamoto, Hisao Yoshida
Summary: The design of optimized photothermal catalysts is essential for the efficient conversion of CO2 into syngas using solar energy. This study demonstrated that silica-supported nickel catalysts prepared via Ni phyllosilicate exhibited superior catalytic performance and resistance to sintering and carbon deposition under visible and near-infrared light. The loading of nickel had positive and negative effects on the surface temperature and light absorption capacity, which influenced the photothermal catalytic activity for methane dry reforming.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Applied
Kexin Zou, Akira Yamamoto, Hisao Yoshida
Summary: In this study, the photocatalytic functionalization of aromatic rings was investigated using metal-loaded titanium oxide photocatalyst. The direct methylation of benzene was achieved by using acetic acid as a methylation reagent under light irradiation.
Article
Chemistry, Applied
Hiroki Yasumura, Akira Yamamoto, Hisao Yoshida
Summary: The properties of potassium hexatitanate (K2Ti6O13, KTO) photocatalyst and the deposited Ag cocatalyst have an influence on the photocatalytic reduction of carbon dioxide to carbon monoxide. The calcination temperature and crystallite size of the KTO sample are positively correlated with the photocatalytic activity. The state of the Ag cocatalyst is also influenced by the calcination temperature, thus affecting the properties of the catalyst. Therefore, the photocatalytic activity is determined by both the properties of the KTO sample and the deposited Ag cocatalyst.
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
